package com.qihang.web.security;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import com.qihang.core.domain.UserEntity;
import com.qihang.util.RequestUtil;

public class CommonInterceptor  extends HandlerInterceptorAdapter{

	private Logger logger = Logger.getLogger(CommonInterceptor.class);
	
    
    
    @Override    
    public boolean preHandle(HttpServletRequest request,    
            HttpServletResponse response, Object handler) throws Exception {    
       
        logger.info("==============执行顺序: 1、preHandle================");    
        String requestUri = request.getRequestURI();  
        String contextPath = request.getContextPath();  
        String url = requestUri.substring(contextPath.length());  
        
        logger.info("requestUri:"+requestUri);    
        logger.info("contextPath:"+contextPath);    
        logger.info("url:"+url);    
          
        UserEntity user =  (UserEntity)request.getSession().getAttribute("user");
        if(url.equals("/sys/login")){
        	 return true;  
        }
        
        if(user == null){ 
        	 if ("GET".equalsIgnoreCase(request.getMethod())) {  
                 RequestUtil.saveRequest(request);  
             }  
        	 
        	logger.info("Interceptor：跳转到login页面！");  
            request.getRequestDispatcher("/WEB-INF/views/login.jsp").forward(request, response);  
            return false;  
        }else  
            return true;     
    }    
    
    /** 
     * 在业务处理器处理请求执行完成后,生成视图之前执行的动作    
     * 可在modelAndView中加入数据，比如当前时间 
     */  
    @Override    
    public void postHandle(HttpServletRequest request,    
            HttpServletResponse response, Object handler,    
            ModelAndView modelAndView) throws Exception {     
    	logger.info("==============执行顺序: 2、postHandle================");    
        if(modelAndView != null){  //加入当前时间    
            modelAndView.addObject("var", "测试postHandle");    
        }    
    }    
    
    /**  
     * 在DispatcherServlet完全处理完请求后被调用,可用于清理资源等   
     *   
     * 当有拦截器抛出异常时,会从当前拦截器往回执行所有的拦截器的afterCompletion()  
     */    
    @Override    
    public void afterCompletion(HttpServletRequest request,    
            HttpServletResponse response, Object handler, Exception ex)    
            throws Exception {    
    	logger.info("==============执行顺序: 3、afterCompletion================");    
    }    
    
    
}
